Improvement in propulsion of vessels



EMILY E. I A' S'SEY. PROPUILSI'ON 0F x'fEsssLs. Na.'184,997. PatentedDec. 5, 1876'.

' THE GRAPH: coux UNITED STATES PATENT OFFICE...

EMILY EVANS TASSEY, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN PROPULSION OF VESSELS.

Specification forming part of Letters Patent No. 184,997, dated December5,1876; application filed April 25, 1874.

To all whom it may concern Be it known that I, EMILY E. TASSEY, ofPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented a certain new and useful Improvement in Apparatus forPropelling Boats; and I do hereby declare that the following is a fulland exact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

The nature of my invention consists in the combination of asiphon-formed tube with a propeller-wheel, for the purpose of gaining anincrease of power for'the propelling of boats and the operating ofmachinery.

To enable others skilled in the art with which it is most nearlyconnected, I will proceed to describe its construction and operation.

In the accompanying drawings, which form part of my specification,Figure l is a side elevation of my improvement as applied to a boat forthe purpose of propelling it. Fig. 2 is a vertical and longitudinalsection of the same.

In the accompanying drawings, A represents the hull of a boat ofordinary construction. B represents a curved tube, which extends t'romthe bow O to the stern D of the boat. The end 0 of the tube B is on ahigher plane than the end f, whereby the tube B, wh n filled with waterthrough the medium of the propeller-wheel g, will act as a siphon,drawing water from in front of the bow O, and discharging at the sternI) of the boat with an increased force commensurate with the highestpoint and diameter of the tube B, and the column of water passingthrough it. Within the mouth of the tube B is pivoted a propeller-wheel,g, the axis h of which has its hearing at t and j, and is provided witha driving-pulley, k, rotated through the medium 4 of a chain, I, whichpasses over pulleys m and around the driving-pulley n, operated by anysuitable power.

The siphon-tube B may vary in altitude from the slightest curve to thearc of a circle which shall have for its perpendicular (or versed sine)the distance of about thirty feet, the height to which water rises invacuum; and with this varying altitude the chord of this are must varyso that the insertion of the ends of the tube in the surface of thewater shall be at the angle of inclination most conpropeiling powerviz.at an angle of about forty-five degrees or less.

The tube containing the propeller may have its entrance in the bow ofthe boat, rising upwardly in a regular curve above the waterline at anangle of or about forty-five degrees, and having its exit through thebottom of the hull at a point distant about one-half the length of thevessel or, as in a long vessel, the regularly' upwardly-curved tuberising above the water-line may have its entrance and exit at pointsequally distant from the bow and stern.

Having thus described the nature andoperation of my invention, what Iclaim is The boat A, provided with upwardly-curved tube B, one end ofsaid tube having its entrance through the bow, and the other its exitthrough the stern, the same having within the forward end of its borethe propeller-wheel g, operatedby suitable mechanism, all constructedand arranged substantially as and for the purpose set forth.

EMILY EVANS TASSEY.

Witnesses: v

A. O. JOHNSTON, JOHN T. TYLER.

